1 /* 2 * Persistent Storage - pstore.h 3 * 4 * Copyright (C) 2010 Intel Corporation <tony.luck@intel.com> 5 * 6 * This code is the generic layer to export data records from platform 7 * level persistent storage via a file system. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 #ifndef _LINUX_PSTORE_H 23 #define _LINUX_PSTORE_H 24 25 #include <linux/time.h> 26 #include <linux/kmsg_dump.h> 27 28 /* types */ 29 enum pstore_type_id { 30 PSTORE_TYPE_DMESG = 0, 31 PSTORE_TYPE_MCE = 1, 32 PSTORE_TYPE_UNKNOWN = 255 33 }; 34 35 struct pstore_info { 36 struct module *owner; 37 char *name; 38 spinlock_t buf_lock; /* serialize access to 'buf' */ 39 char *buf; 40 size_t bufsize; 41 struct mutex read_mutex; /* serialize open/read/close */ 42 int (*open)(struct pstore_info *psi); 43 int (*close)(struct pstore_info *psi); 44 ssize_t (*read)(u64 *id, enum pstore_type_id *type, 45 struct timespec *time, char **buf, 46 struct pstore_info *psi); 47 int (*write)(enum pstore_type_id type, 48 enum kmsg_dump_reason reason, u64 *id, 49 unsigned int part, size_t size, struct pstore_info *psi); 50 int (*erase)(enum pstore_type_id type, u64 id, 51 struct pstore_info *psi); 52 void *data; 53 }; 54 55 #ifdef CONFIG_PSTORE 56 extern int pstore_register(struct pstore_info *); 57 #else 58 static inline int 59 pstore_register(struct pstore_info *psi) 60 { 61 return -ENODEV; 62 } 63 #endif 64 65 #endif /*_LINUX_PSTORE_H*/ 66